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Masking GIFs with other GIFs

3.12.2019
The other day, Cassie Evans tweeted a really neat trick that I’ve never seen before: using SVG to mask one GIF on top of another. The effect is quite lovely, especially if you happen to grab a colorful GIF and place it on top of a monochrome one:  See the Pen Masking gifs with other gifs......

Mirror Android Device to Computer

26.11.2019
As I continue my adventure into Android development, pair programming has been a huge help in learning this new platform. When it’s time to build and run the app, relying on the emulator is a fools’ game — the emulator is slow and it’s hard to reliably simulate gestures....

Image Lazy Loading

25.11.2019
Lazy loading images is a practice that’s been popular for a decade and for good reason: images are usually the heaviest downloads on a given webpage and avoiding unloading images that are never seen saves the user bandwidth. There are plugins for lazy loading images in every JavaScript...

Getting Started with GraphQL

20.11.2019
GraphQL was developed by Facebook in 2012 to power up its mobile apps. Since open-sourcing GraphQL specification in 2015, it gained a lot of popularity and is now used by many development teams, including giants like GitHub, Twitter or Airbnb. Why so? And what exactly is a GraphQL? Let's take...

Real-Time Google Search Results API with serpstack (Sponsored)

19.11.2019
In my early web days, I was interested in scraping and collecting data based on the results of Google searches. Scraping Google was easier in those days but now Google search results are so dynamic that you can’t rely on getting the same HTML or data structure back. Add in CAPTCHAs, rate...

Pac-Man… in CSS!

11.11.2019
You all know famous Pac-Man video game, right? The game is fun and building an animated Pac-Man character in HTML and CSS is just as fun! I’ll show you how to create one while leveraging the powers of the clip-path property. See the Pen Animated Pac-Man by Maks Akymenko (@maximakymenko) ...

Hello Fenix!

11.11.2019
Over seven years ago I made the massive career leap to Mozilla. Two years ago I realized a dream of joining the Firefox DevTools team — it’s been a rewarding adventure helping to improve the Firefox DevTools Debugger and other super helpful tools. I’m frightened, excited,...

JavaScript waitForTime

6.11.2019
I write a lot of tests for new features within Firefox DevTools. We have hundreds of “mochitests” which open the browser and perform synthetic actions like clicking, typing, and other user actions. I’ve previously written about waitForever which essentially halts following actions...

Simple Scraping API with zenscrape (Sponsored)

5.11.2019
So many developers believe that scraping a URL’s content is easy — just a simple curl and you’re done, right? Nope. CAPTCHAs, rate limitations, origin-specific limitations — they make getting content off the web a nightmare. Luckily we now have services like zenscrape which...

[aktualita] Škoda Auto spustila vlastní superpočítač

4.11.2019
HPC společnosti údajně momentálně disponuje výpočetním výkonem 2 petaFLOPS a má sloužit například pro aerodynamické simulace nebo pro vývoj nových bezpečnostních prvků a motorů. Počítač je v provozu od posledního říjnového dne a fyzicky se nalézá v loni rozšířeném datovém centru v hlavním sídle...

5 Easy Ways to Earn Cryptocurrency

4.11.2019
The days of individuals mining popular cryptocurrencies are over. The amount of time and energy required to mine bitcoin is immense and you’d be competing with business with massive mining farms. What you can do, however, is chip away at earning cryptocurrency via a few simple tasks that...

How to Use JPEG 2000 (JP2) for a Faster Images on iPhone (Sponsored)

21.10.2019
Images Slow Down Websites Images slow down the page-loading performance of many websites. Audit tools like Google’s Lighthouse can quickly tell you how many seconds you can save by optimizing your images. When you are delivering to desktops or android devices running Chrome browser, a quick...

Making Tables Responsive With Minimal CSS

17.10.2019
Here’s a fabulous CSS trick from Bradley Taunt in which he shows how to make tables work on mobile with just a little bit of extra code. He styles each table row into a card that looks something like this: See the Pen Responsive Tables #2.5: Flexbox by Bradley Taunt (@bradleytaunt) ...

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